<template>
    <div>
        <el-breadcrumb separator-class="el-icon-arrow-right">
  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
  <el-breadcrumb-item>商品管理</el-breadcrumb-item>
  <el-breadcrumb-item>添加商品</el-breadcrumb-item>
</el-breadcrumb>
<el-card>
    <el-alert
    title="添加商品信息"
    type="info"
    show-icon center :closable="false">
  </el-alert>
  <el-steps :space="200" :active="activeindex - 0" finish-status="success" align-center>
  <el-step title="基本信息"></el-step>
  <el-step title="商品参数"></el-step>
  <el-step title="商品属性"></el-step>
  <el-step title="商品图片"></el-step>
  <el-step title="商品内容"></el-step>
  <el-step title="完成"></el-step>
</el-steps>
<el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
<el-tabs v-model="activeindex" :tab-position="'left'" :before-leave="beforeTab" @tab-click="tabClicked">
    <el-tab-pane label="基本信息" name="0">
    <el-form-item label="商品名称" prop="goods_name">
    <el-input v-model="addForm.goods_name"></el-input>
     </el-form-item>
     <el-form-item label="商品价格" prop="goods_price">
    <el-input v-model="addForm.goods_price" type="number"></el-input>
     </el-form-item>
     <el-form-item label="商品重量" prop="goods_weight">
    <el-input v-model="addForm.goods_weight" type="number"></el-input>
     </el-form-item>
     <el-form-item label="商品数量" prop="goods_number">
    <el-input v-model="addForm.goods_number"></el-input>
     </el-form-item>
     <el-form-item label="商品分类" prop="goods_cat">
         <el-cascader
    expand-trigger="hover"
    :options="catelist"
    v-model="addForm.goods_cat"
    :props="cateProps"
    @change="handleChange">
  </el-cascader>
     </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品参数" name="1">
        <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品属性" name="2">
        <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
        <el-input v-model="item.attr_vals"></el-input>
        </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品图片" name="3">
        <el-upload :action="uploadURL" :on-preview="handlePreview" :on-remove="handleRemove" list-type="picture" :headers="headerObj" :on-success="handleSuccess">
            <el-button size="small" type="primary">点击上传</el-button>
        </el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
        <quill-editor v-model="addForm.goods_introduce"></quill-editor>
        <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
    </el-tab-pane>
  </el-tabs>
</el-form>
</el-card>
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" alt="" class="previewImg">
    </el-dialog>
    </div>
</template>
<script>
import _ from 'lodash'
export default {
    data(){
        return{
            activeindex:'0',
            addForm:{
                goods_name:'',
                goods_price:0,
                goods_weight:0,
                goods_number:0,
                goods_cat:[],
                pics:[],
                goods_introduce: '',
                attrs: []
            },
            addFormRules:{
                goods_name:[
                    { required: true, message: '请输入商品名称', trigger: 'blur' },
                ],
                goods_price:[
                  {required: true, message: '请输入商品价格', trigger: 'blur' },   
                ],
                goods_weight:[
                    { required: true, message: '请输入商品重量', trigger: 'blur' },
                ],
                goods_number:[
                    { required: true, message: '请输入商品数量', trigger: 'blur' },
                ],
                goods_cat:[
                    { required: true, message: '请选择商品分类', trigger: 'blur' },
                ]
            },
           catelist:[],
           cateProps:{
                value:'cat_id',
                label:'cat_name',
                children:'children'
           },
           manyTableData:[],
           onlyTableData:[],
           uploadURL:'https://www.liulongbin.top:8888/api/private/v1/upload',
           headerObj:{
               Authorization: window.sessionStorage.getItem('token')
           },
           previewPath: '',
           previewVisible: false
        }     
    },
    created(){
            this.gteCateList()
    },
    methods:{
       async gteCateList(){
           const{data:res} = await this.$http.get('categories')
            if(res.meta.status !==200){
                return this.$mes.error('获取商品分类数据失败！')
            }
            this.catelist=res.data
            console.log(this.catelist)
        },
        handleChange(){
            console.log(this.addForm.goods_cat)
            if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = []
      }
        },
        beforeTab(activeName,oldActiveName){
            // console.log('即将离开' + oldActiveName)
            // console.log('即将进入' + activeName)
            if(oldActiveName ==='0' &&this.addForm.goods_cat.length !==3){
                this.$mes.error('请选择商品分类！')
                return false
            }
        },
        async tabClicked() {
      // console.log(this.activeindex)
      // 证明访问的是动态参数面板
      if (this.activeindex === '1') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'many' }
          }
        )

        if (res.meta.status !== 200) {
          return this.$mes.error('获取动态参数列表失败！')
        }

        console.log(res.data)
        res.data.forEach(item => {
          item.attr_vals =
            item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
        })
        this.manyTableData = res.data
      } else if (this.activeindex === '2') {
        const { data: res } = await this.$http.get(
          `categories/${this.cateId}/attributes`,
          {
            params: { sel: 'only' }
          }
        )

        if (res.meta.status !== 200) {
          return this.$mes.error('获取静态属性失败！')
        }

        console.log(res.data)
        this.onlyTableData = res.data
      }
      },
    handlePreview(file) {
      console.log(file)
      this.previewPath = file.response.data.url
      this.previewVisible = true
    },
    // 处理移除图片的操作
    handleRemove(file) {
      // console.log(file)
      // 1. 获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path
      // 2. 从 pics 数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex(x => x.pic === filePath)
      // 3. 调用数组的 splice 方法，把图片信息对象，从 pics 数组中移除
      this.addForm.pics.splice(i, 1)
      console.log(this.addForm)
    },
    // 监听图片上传成功的事件
    handleSuccess(response) {
      console.log(response)
      // 1. 拼接得到一个图片信息对象
      const picInfo = { pic: response.data.tmp_path }
      // 2. 将图片信息对象，push 到pics数组中
      this.addForm.pics.push(picInfo)
      console.log(this.addForm)
    },
    add(){
        this.$refs.addFormRef.validate(async valid => {
        if (!valid) {
          return this.$mes.error('请填写必要的表单项！')
        }
        // 执行添加的业务逻辑
        // lodash   cloneDeep(obj)
        const form = _.cloneDeep(this.addForm)
        form.goods_cat = form.goods_cat.join(',')
        // 处理动态参数
        this.manyTableData.forEach(item => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(' ')
          }
          this.addForm.attrs.push(newInfo)
        })
        // 处理静态属性
        this.onlyTableData.forEach(item => {
          const newInfo = { attr_id: item.attr_id, attr_value: item.attr_vals }
          this.addForm.attrs.push(newInfo)
        })
        form.attrs = this.addForm.attrs
        console.log(form)

        // 发起请求添加商品
        // 商品的名称，必须是唯一的
        const { data: res } = await this.$http.post('goods', form)

        if (res.meta.status !== 201) {
          return this.$mes.error('添加商品失败！')
        }

        this.$mes.success('添加商品成功！')
        this.$router.push('/goods')
      })
    }
    },   
    computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2]
      }
      return null
    }
  }
    }
</script>
<style lang="less" scoped>
.el-breadcrumb{
    font-size: 15px;
    line-height: 50px;
}
.el-alert{
    margin-bottom: 15px;
}
.el-tabs{
    margin-top: 15px;
}
.el-checkbox{
    margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd{
    margin: 15px;
}
</style>